What do you think of the term "trolling"?

I think since this term came out it was a very derogatory term. I honestly think its very hateful and unkind word thats used alot of forums and online. Please tell me what you think of it. I havent been called it but i see alot of people use it and it annoys me.

Trolling is kinda a fun way to express yourself. (Other side of yourself) Providing Sarcasm to others that are dumb enough to understand a simple thing or to the trolls itself. It is usually marked as "To Be Banned" because they degrade the quality of the forums they stay. But as I said, If there are no Trolls, The forums are boring.

Posting funny stuffs online in insincere way !
As for example- someone ask something like OMG my boy friend had a baby !
So what do i do ? They think that they are funny !

OR
If someone says, i eat shit, he knows he don't but just trying to be funny !
That's trolling !